Device having an electrically heatable honeycomb body and method for operating the honeycomb body

a technology of electrical heat dissipation and honeycomb, which is applied in the direction of machine/engine, exhaust treatment electric control, separation process, etc., can solve the problem of relative fine insulating structur
US20140112850A1Active Publication Date: 2014-04-24EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBH
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBH
Publication Date
2014-04-24

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Abstract

A device for exhaust gas treatment in an exhaust system of an internal combustion engine, in particular in a motor vehicle, includes an electrically heatable honeycomb body through which an exhaust gas can flow. The honeycomb body is disposed in a casing tube and has at least one current-conducting structure with electric insulation for voltages greater than 24 V. A current-generating pulsed voltage is applied to the structure to heat the honeycomb body. It is thus possible for heating elements in the exhaust-gas flow to be powered by an on-board electrical system voltage of for example 48 V. A method for operating the honeycomb body is provided with which, even at operating voltages greater than 24 V, the generation of heat in the electrically heatable honeycomb body can be kept in a desired range by adjustment of a pulse width and / or repetition frequency of the pulsed voltage.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This is a continuation, under 35 U.S.C. §120, of copending International Application No. PCT / EP2012 / 061391, filed Jun. 15, 2012, which designated the United States; this application also claims the priority, under 35 U.S.C. §119, of German Patent Application DE 10 2011 104 193.5, filed Jun. 15, 2011; the prior applications are herewith incorporated by reference in their entirety.BACKGROUND OF THE INVENTIONField of the Invention

[0002] The present invention relates to a device for catalytically converting, or otherwise treating, exhaust gases in an exhaust system, in particular in an exhaust gas purification system of a motor vehicle. The device has a honeycomb body which is disposed in a casing tube, can be heated electrically, and through which an exhaust gas can flow. The invention also relates to a method for operating such an electrically heatable honeycomb body. For this purpose, the honeycomb body has a current-conducting structure to ...

Claims

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